Full Stack Web Development with Raspberry Pi 3

The database - persistence

Data is the name we give to raw information, which is information that we cannot easily aggregate or understand. Without a way to store and meaningfully process and retrieve this data, it will always remain data and never information, which is what we actually want.

If we just hook up a sensor and display whatever data it reads, we are missing out on a lot of additional information. Let's take the example of temperature: what if we wanted to find out how the temperature was changing over time? What if we wanted to find the maximum and minimum temperatures for a particular day, or a particular week, or even within a custom duration of time? What if we wanted to see temperature variation across locations? There is ...